Xdot is described as 'Py - Interactive viewer for graphs written in Graphviz's dot language' and is an app. There are 2 alternatives to Xdot for a variety of platforms, including Linux, Snapcraft, Flathub, Flatpak and Mac apps. The best Xdot alternative is KGraphViewer, which is both free and Open Source.
KGraphViewer is a Graphviz DOT graph file viewer, aimed to replace the other outdated Graphviz tools. Graphs are commonly used in scientific domains and particularly in computer science.
ZGRViewer is a graph visualizer implemented in Java and based upon the Zoomable Visual Transformation Machine. It is specifically aimed at displaying graphs expressed using the DOT language from AT&T GraphViz and processed by programs dot, neato or others such as twopi.
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